Improved steam-engine



ARCHIBALD o. CRARY,

or UTICA, NEW YORK.

Letters Patent No. 88,278, dated March 30, A1869.

The Schedule referred` to in these LettexsPatent and making part ofthesame.

Be it known that I, ARQHIBALD C. GRARY, a resident of the city of Utica,in the State of New York, have invented a new and useful Improvement onSteam-Engines, and on the steam-generator described in patent, No.77,871.

My invention consists in certain improvements on steam-engines, and onthe steam-generator, by means of which a draught is produced in thefire-box of a locomotive, without the aid of exhaust steam,tlierebypermitting the'exhaust steam, in connection with or in lien ofthe steamproduced in the steam-generator, to be used in warming railway-cars andI do hereby declare that the following is a full, clear, and exactdescription thereof, reference being had to the accompanying drawings,and to the letters of reference marked thereon, making part of thisspeCiIicatiOn, in which- Figure l is a perspective view of thelocomotive, and of the steam-generator.

Figure 2 is a longitudinal sectional view of the boilers A and B, orsteam-generators, engine H, and fancase T.

A, fig. l, represents the boiler of a locomotive. v

B is the external, and B, the internal cylinder of 1 the steam-drum.:

D is av pipe from the steam-drum, and connects it with engine H.

The piston-head S, g. 2, i'n engine H, is firmly attached to thepiston-rod F, which is also attached to fan T. n The piston-head isoperated by the steam from the steam-drum in its transit to the cars,and by means of the piston-rod F, causes the fan T to revolve, and thusto produce acurrent of air, through an air-tube, to the ash-pan P.

D is an induction-pipe, and G, an eduction-pipe of engine H.

The pipe G, in connection with the intermediate pipe Y, iig. 3, conveysthe .steam received from engine H to the cars.` A

E, g. 1, is an eduction-pipe of engine H, which conveys the steam to thevertical outer chamber in the steam-drum, when it is not applied towarming the cars.

'In connection with the current of air which is forced into the fire-boxO, fig. 2, by fan T, a secondcurrent of air is brought from the front ofthe locomotive by tube N. This current of air` is forced in thefunnelshaped end of tube N, g. 1, by the motion of the 1ocomotive.

Tube N extends from the front end of the'locomotive to the air-tightash-pan chamber P, and is designed to form a draught in the {ire-box.Through steam-pipe' R the exhaust steam ows into the vertical chamber ofthe steam-drum, which is formed by uniting the lower extremity ofcylinder B to-an air-tight'horizontal iiange, or ring, to B. Thisvertical chamber is designed for the passage of the exhaust steam, whenit is not used in warming the cars.

M,g. 1, is the eduction-pipe of cylinder W. Through this pipe theexhaust steam may be made, bymeans of stop-cocks, to flow into the lowerextremity of cylinder B2.

All the exhaust steam may, bymeaus of stop-cocks, 'be made to flowthrough pipe R, or it may be caused toow through the steam-pipes R an'dM, by means of steam-cocks suitablyplaced in these pipes.

The pipes in B should be of greater diameter than those in the boiler. jThe steam-drum contains, in its centre, cylinder B. When the exhauststeam is driven through cylinder B2, it is to increase the draught inthe fire-box.

:Having thus described my invention, p What I claim therein as new anduseful, and desire to secure by Letters Patent of the United States, is-

The arrangement, with'reference to the steam-generator A and drum B,constructed as described, ofthe engineH, fan I, and tube N, with pipes Gand E, the

cylinder M, 4and its pipes R and M, as herein set forth.

ARCHIBALD O. ORARY.V Witnesses: ,h

l N. E. KEIRNA'N,

WM. Kunnen, Jr.

